Resonating relay.



H. 'VON KRAMER L G. KAPP..

RESONATING RELAY.

APPLICATION FILED APR,11, 1912.

1,067,823, Patent-,ea July 2.2, 1913.

2 SHEETS-SHEET l.

H. VON KRAMER L G. KAPP.

RESONATING RELAY.

APPLL/ATION FILED APB..11, 1912. 1,067,823 Patented July 22, i913.

2 SHEETS-SHEET 2.

Evan -ma Gifagf I www@ @y www@ l. ln a relay contact device operated byfeeble alternating currents tor the purpose oit controlling a localcircuit, the combination of a permanent magnet.; a reed tuned to theperiodicity ot the alternating current in the controlling circuit andhaving its one enda lirmly lined to one pole of said magnet; symmetricalpolar extensions on the second pole ot' said magnet and terminating oneither side ot the tree end ot' said reed; coils around said polarextensions in series with each other and `forming part of thecontrolling circuit; and two flanking contact springs torming part ot'the local. circuitl and having a natural period ot vibi'a.- tienditterent to the reed and mounted on either side et said reed; andarranged that when thedeed vibrates the llanlring contact springs, arelinoclred apart to control a second circuit; for the purpose specifiedand substantially as set forth` 2. ln a relay Contact device operated byfeeble alternating currents for the purpose of controlling a localcircuit, the combination of a permanent magnet; a reed tuned to theperiodicity ot the alternating currenty in the controlling circuitandhaving one end fixed to one pole of the magnet; symmetrical polar,extensions on the second pole the magnet and terminating on oppositesides ol the free end otsaid reed; coils around said polar extensionsand forming a part ot' the controlling circuit; a pair of lianliingsprings ha: ing a natural vibration ditferent to that.\ot` said reed andmounted so as to vibrate respectively on opposite sides of said free endan to be vibrated by the vibration ot said ,tree end; and. conducto-rsfor a local circuit adapted to be controlled by said vibration.

3. ln a relay contact device operated by feeble alternating currents forthe purpose of controlling a local circuit the combination oi apermanent magnet, a reed tuned to the periodicity of the alternatingcurrent in the controlling circuit and having its one end tirini f fixedto one pole ot' said magnet, synunetrical extensions ot the second poleot said magnet and terminating on either side ol the free end of saidreed, coils around said polar extensions in series with each other andforming part oit the controlling circuit, a Contact device controlled bythe vibrations of the said reed, insulated blocks carried by cachot thepolar extensions, adjustable screws carried by said blocks and abuttingagainst a fixed part of the relay, so arranged thatwhen the screws areoperated the air "rap between each ot the roer/,sas

polar extensions and the reed maybe independently adjusted; for thepurpose specilied and substantially as set forth.

il. ln a relay contact device operated by feeble alternating currentsfor the purpose of controlling a local circuit the combination ot a.permanent n'mgnet, a reed tuned to the periodicity ot the alternatingcurrent in the controlling circuit and having its one end firmly fixedto one pole of said magnet, symmetrical extensions olt the second poleot said magnet and terminating on either side of the tree end ot saidreed., coils around said polar extensions in series with each other andforming part of 'the controlling circuit, ltivo flanking contact springstorming part oit' the local circuit having a natural period ot'vibration different to the reed and mounted on either side ot said reed;so

arranged that when the reed vibrates the thinking contact. springs areknocked apart to open their circuit; tor the purpose specilied andsubstantially set t'orth.

In a relay Contact device feeble alternating currents for the purposeot' controlling a local circuit the combination of a permanent magnet, areed tuned to the periodicity ot' the alternating current in thecontrolling circuit and having its one end rnily fixed to one pole otsaid magnet, symmetrical. extensions of the second pole ot said magnetand terminating on either side of the 'rtree end of saidv reed, coilsaround said polarextensions inv series with each other and forming partof the controlling circuit, a contact device controlled by brations otthe said reed, insulated blocks carried by each of the polar extensions,adjustable set screws carried by said blocks and abutting against afixed part of the relay; so arranged that when the screws are operatedthe air gap between each, ot the polar extensions and the reed may beindependently adjusted, and two flanking contact springs forming part ofthe local circuit having a natural period of vibration different to thereed and mounted on either side ot' said reed; so arranged that when thereed vibrates the flanking contact springs are knocked apart to opentheir circuit; for the purpose specilied and substantially as set forth.

ln testimony whereof, we naines to this specification in two subscribingwitnesses.

" HANS voN KRAMER.

GISBERT KAP?.

have signed our the presence of ill/itnesses:

l-l Anoia) J. l-loNns'rnn, Nonnen; S. BARLOW.

operated by the vi-.

